width VOLVO S90 TWIN ENGINE 2019 Owners Manual

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WHEELS AND TIRES
546
perature is normally reached after the vehiclehas been parked for at least 3 hours.

Related information
Tires (p. 542)
Tire sidewall designations
The following information can be found on atire's sidewall.
Federal law mandates that tire manufacturersplace standardized information on the sidewall ofall tires (see the illustration).
The vehicle has been certified with certain combi-nations of wheels and tires.
The following information is listed on the tiresidewall:
The tire designation:
NOTE
Please be aware that the following tire desig-nation is an example only and that this par-ticular tire may not be available on your vehi-cle.
1.215: the width of the tire (in millimeters)from sidewall edge to sidewall edge. Thelarger the number, the wider the tire.
2.65: The ratio of the tire's height to its widthin percent.
3.R: Radial tire (the designation RF and the
symbol indicate that the vehicle isequipped with optional self-supporting run
flat tires3.
4.15: The diameter of the wheel rim (ininches).
5.95: The tire's load index. In this example, aload index of 95 equals a maximum load of1521 lbs (690 kg).
6.H: The tire's speed rating, or the maximumspeed at which the tire is designed to bedriven for extended periods of time, carryinga permissible load for the vehicle, and withcorrect inflation pressure. For example, Hindicates a speed rating of 210 km/h(130 mph).
3Self-supporting run flat tires may not be available on all models.

WHEELS AND TIRES
548
Uniform Tire Quality Grading
ALL PASSENGER VEHICLE TIRES MUSTCONFORM TO FEDERAL SAFETY REQUIRE-MENTS IN ADDITION TO THESE GRADES.
Quality grades can be found, where applica-ble, on the tire sidewall between the treadshoulder and maximum section width. Forexample:
Treadwear 200 Traction AA Temperature A

TREADWEAR
The treadwear grade is a comparative ratingbased on the wear rate of the tire when testedunder controlled conditions on a specified gov-ernment test course. For example, a tire graded150 would wear one and one half (1 ½) times aswell on the government course as a tire graded100. The relative performance of tires dependsupon the actual conditions of their use, however,and many depart significantly from the norm dueto variation in driving habits, maintenance practi-ces and differences in road characteristics andclimate.

TRACTION
The traction grades, from highest to lowest, areAA, A, B, and C, as measured under controlledconditions on specified government test surfacesof asphalt and concrete. A tire marked C mayhave poor traction performance.
WARNING
The traction grade assigned to this tire isbased on braking (straight-ahead) tractiontests and is not a measure of cornering (turn-ing) traction.

TEMPERATURE
The temperature grades are A (the highest), B,and C, representing the tire's resistance to thegeneration of heat and its ability to dissipate heatwhen tested under controlled conditions on aspecified indoor laboratory test wheel. Sustainedhigh temperature can cause the material of thetire to degenerate and reduce tire life, and exces-sive temperature can lead to sudden tire failure.The grade C corresponds to a minimum level ofperformance that all passenger vehicle tires mustmeet under the Federal Motor Safety StandardNo. 109. Grades B and A represent higher levelsof performance on the laboratory test wheel thanthe minimum required by law.

WARNING
The temperature grade for this tire is estab-lished for a tire that is properly inflated andnot overloaded. Excessive speed, under-infla-tion, or excessive loading, either separately orin combination, can cause heat buildup andtire failure.
Related information
Tires (p. 542)
Tire sidewall designations (p. 546)

SPECIFICATIONS
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641
Dimensions
The vehicle's length, height, etc. are shown inthe table.
Dimensionsmm inches
AGround clearanceA1415.6
BWheelbase3061 120.5
C Length5083 200.1
D Load length, floor,
folded backrestB2098 82.6
E Load length, floor 1149 45.2
FHeightC1450 57.1
Dimensionsmm inches
G Load height43517.1
H Wheel track, front1628D
1618E
1617F
64.1D
63.7E
63.7F
I Wheel track, rear1629D
1619E
1618F
64.1D
63.7E
63.7F
Dimensionsmm inches
J Load width, floor1014 39.9
K Width1879G
1890H
74.0G
74.4H

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SPECIFICATIONS
642
Dimensionsmm inches
L Width incl. rearviewmirrors201979.5
M Width incl. folded rear-view mirrors1895 74.6
AAt curb weight + 2 people. (Varies slightly depending on tiredimensions, chassis, etc.)BDoes not apply to vehicles with 3 or 4 seats.CIncluding roof antenna, at curb weight.DVehicles with 17/18-inch wheels.EVehicles with 19-inch wheels.FVehicles with 20-inch wheels.GChassis width.HAt door moldings.

Related information
Weights (p. 643)